Android : How can I switch from Pattern to Slide?

Check the Screen Lock setting to see if the low-security options are now enabled.

If that doesn’t work, you can revert your lockscreen security to Slide.

Set your lockscreen security to Pattern from Settings>Security>Screen Lock.

Click the power button on your phone to lock it.

Click the power button again, but don’t unlock your phone. There should be a button labelled Forgot Password. Note: On some devices, you may need to incorrectly enter the password/pattern several times until that option appears.

Enter your Google account credentials.

Your lock settings should now be Slide. Note: With this method, the option forSlidesecurity will still by disabled, but you should still have it as the lockscreen security on your phone.